The frontend sends dm_scope as part of the session config, but the
backend SessionConfig struct lacked the corresponding field. Go's
encoding/json silently discards unknown fields, so the value was lost
on every PATCH request. Additionally, MarshalJSON only emitted the
session block when Dimensions or IdentityLinks were set, so even a
stored dm_scope would not appear in GET responses.
- Add DmScope string field with json tag 'dm_scope' to SessionConfig
- Update MarshalJSON condition to include session when DmScope is set
SiYue-ZO
0bbd8f081e